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Apr 1, 2010 - 13 posts - ‎6 authors
My passenger side low beam headlight recently went off on me. ... I've changed the bulb again, and changed the fuse just in case, but .... My driver side headlight wire got loose so when i hit a bump at night if would flicker. ... When you notice one side not working (Low or High beam) it could be the module.
Headlight replacement
15 posts
Jan 22, 2009Low beams don't work but High's do
8 posts
Mar 20, 2005More results from www.nissanclub.com

A loose ground wire to the headlight will keep it dim,Or a headlight adjustment will bring the headlight up.If you can have your headlight turned on a garage door or something at night,and then watch as you change your headlights from low beam to high beam which ones are higher.the last thing to verify is that your high beam headlights are not the plastic lens type that turn dull which cuts the light power.

Just unscrew the screws holding down the black tabs on top of the
headlights and you have to gently pull the headlight out , be careful
because the bottom of the headlight has a tab holding it in place (be
patient might have to move it around to release the bottom tab). And do
the opposite when putting the new headlights on. Even if the bottom tab breaks. the tabs on the top will old the headlight in place. Once it's changed, you'll need to re-aim the headlights...

The adjustment screws/nuts should be located either on the top of the headlamp assembly,
behind the headlamp assembly, or near the frame rail by the radiator
support.

You will have vertical adjustment screws for each independent beam
(separate highs and separate lows, but will be same screw if highs and
lows are the same bulb). You may also have additional horizontal
adjustment screws as well

Park
your car on a level ground 30 feet from a wall and measure the height
from the ground to the bulb and mark on a wall (do this for highs beams
and low beams if the bulbs are separate, if highs and lows are the same
bulb, only do it for the lows)

For Low Beams: If the headlights read VOR, then
aim the brightest part or cutoff part just below the mark on the wall.
If it says VOL or nothing, aim them 2 inches below the mark on the wall.

For High Beams (if separate from low beams): Aim the headlight directly at the line you marked on the wall.

To change the low beam headlight on the 2001 Lesabre, the headlight assembly must first be removed from the car. It is really quite simple to do. There are two bolts on the top of the assembly that must be removed - that is all! The entire assembly comes out and gives easy access to the low beam bulb. Give it a 1/4 counterclockwise turn to remove it. Plus in the new one (#9006) and reverse the procedure.

The same bulb in a lot of applications controls both the high and low beam. Generally the low beam portion will burn out and for a short time you will be able to use the high beam only. I can't be certain which headlight switch that you checked, but the most common solution is to replace the headlight bulb. The bulb is on the inside of the headlight lense and is accessible by opening the hood and peeling back the rubber cover that covers up all of the headlamp apparatus. Depending on the model of vehicle they are mounted in there differently. Make sure and change both at the same time. It is generally cheaper to purchase new headlight bulbs as a (2) pack and it never fails if you change one the other will burn out in a week. Hope this helps